Lux: The lux is a SI unit of illuminance and luminous emissivity that measures flux per unit area and is equivalent to one lumen for every square meter. It is indeed a measurement of the intensity of light that strikes or travels through a substrate in photometry.

Yes, that’s correct! The lux (lx) is indeed a unit of illuminance in the International System of Units (SI). It measures the amount of luminous flux (or light) that falls on a surface area.Here’s a breakdown of what lux measures:Definition: 1 lux is defined as 1 lumen per square meter (lm/m²).Purpose: It quantifies the intensity of light that reaches a surface or is emitted from a source over an area.Application: Lux is commonly used in lighting design, architecture, photography, and various industries where measuring light intensity on surfaces is important.For example:A surface illuminated with 1 lux would receive 1 lumen of light spread over each square meter of that surface.Higher lux values indicate brighter illumination, while lower lux values indicate dimmer illumination.Lux is a crucial measurement in photometry, helping to ensure appropriate lighting levels for tasks, comfort, safety, and aesthetic purposes in various environments.